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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> * Written by Robert Harder and released to the public domain, as explained at</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> * <a href="http://creativecommons.org/licenses/publicdomain" target="alexandria_uri">http://creativecommons.org/licenses/publicdomain</a></em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.codec.base64;
<a class="jxr_linenumber" name="21" href="#21">21</a>  
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBuffer;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.ChannelBufferFactory;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.buffer.HeapChannelBufferFactory;
<a class="jxr_linenumber" name="25" href="#25">25</a>  
<a class="jxr_linenumber" name="26" href="#26">26</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="27" href="#27">27</a>  <em class="jxr_javadoccomment"> * Utility class for {@link ChannelBuffer} that encodes and decodes to and from</em>
<a class="jxr_linenumber" name="28" href="#28">28</a>  <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/Base64" target="alexandria_uri">http://en.wikipedia.org/wiki/Base64</a>"&gt;Base64&lt;/a&gt; notation.</em>
<a class="jxr_linenumber" name="29" href="#29">29</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="30" href="#30">30</a>  <em class="jxr_javadoccomment"> * The encoding and decoding algorithm in this class has been derived from</em>
<a class="jxr_linenumber" name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://iharder.sourceforge.net/current/java/base64/" target="alexandria_uri">http://iharder.sourceforge.net/current/java/base64/</a>"&gt;Robert Harder's Public Domain</em>
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> * Base64 Encoder/Decoder&lt;/a&gt;.</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * @apiviz.landmark</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * @apiviz.uses org.jboss.netty.handler.codec.base64.Base64Dialect</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> Base64 {
<a class="jxr_linenumber" name="38" href="#38">38</a>  
<a class="jxr_linenumber" name="39" href="#39">39</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Maximum line length (76) of Base64 output. */</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MAX_LINE_LENGTH = 76;
<a class="jxr_linenumber" name="41" href="#41">41</a>  
<a class="jxr_linenumber" name="42" href="#42">42</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The equals sign (=) as a byte. */</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte EQUALS_SIGN = (byte) '=';
<a class="jxr_linenumber" name="44" href="#44">44</a>  
<a class="jxr_linenumber" name="45" href="#45">45</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The new line character (\n) as a byte. */</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte NEW_LINE = (byte) '\n';
<a class="jxr_linenumber" name="47" href="#47">47</a>  
<a class="jxr_linenumber" name="48" href="#48">48</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte WHITE_SPACE_ENC = -5; <em class="jxr_comment">// Indicates white space in encoding</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  
<a class="jxr_linenumber" name="50" href="#50">50</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> byte EQUALS_SIGN_ENC = -1; <em class="jxr_comment">// Indicates equals sign in encoding</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  
<a class="jxr_linenumber" name="52" href="#52">52</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> byte[] alphabet(Base64Dialect dialect) {
<a class="jxr_linenumber" name="53" href="#53">53</a>          <strong class="jxr_keyword">if</strong> (dialect == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="54" href="#54">54</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"dialect"</span>);
<a class="jxr_linenumber" name="55" href="#55">55</a>          }
<a class="jxr_linenumber" name="56" href="#56">56</a>          <strong class="jxr_keyword">return</strong> dialect.alphabet;
<a class="jxr_linenumber" name="57" href="#57">57</a>      }
<a class="jxr_linenumber" name="58" href="#58">58</a>  
<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> byte[] decodabet(Base64Dialect dialect) {
<a class="jxr_linenumber" name="60" href="#60">60</a>          <strong class="jxr_keyword">if</strong> (dialect == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="61" href="#61">61</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"dialect"</span>);
<a class="jxr_linenumber" name="62" href="#62">62</a>          }
<a class="jxr_linenumber" name="63" href="#63">63</a>          <strong class="jxr_keyword">return</strong> dialect.decodabet;
<a class="jxr_linenumber" name="64" href="#64">64</a>      }
<a class="jxr_linenumber" name="65" href="#65">65</a>  
<a class="jxr_linenumber" name="66" href="#66">66</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> breakLines(Base64Dialect dialect) {
<a class="jxr_linenumber" name="67" href="#67">67</a>          <strong class="jxr_keyword">if</strong> (dialect == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="68" href="#68">68</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"dialect"</span>);
<a class="jxr_linenumber" name="69" href="#69">69</a>          }
<a class="jxr_linenumber" name="70" href="#70">70</a>          <strong class="jxr_keyword">return</strong> dialect.breakLinesByDefault;
<a class="jxr_linenumber" name="71" href="#71">71</a>      }
<a class="jxr_linenumber" name="72" href="#72">72</a>  
<a class="jxr_linenumber" name="73" href="#73">73</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src) {
<a class="jxr_linenumber" name="74" href="#74">74</a>          <strong class="jxr_keyword">return</strong> encode(src, Base64Dialect.STANDARD);
<a class="jxr_linenumber" name="75" href="#75">75</a>      }
<a class="jxr_linenumber" name="76" href="#76">76</a>  
<a class="jxr_linenumber" name="77" href="#77">77</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, Base64Dialect dialect) {
<a class="jxr_linenumber" name="78" href="#78">78</a>          <strong class="jxr_keyword">return</strong> encode(src, breakLines(dialect), dialect);
<a class="jxr_linenumber" name="79" href="#79">79</a>      }
<a class="jxr_linenumber" name="80" href="#80">80</a>  
<a class="jxr_linenumber" name="81" href="#81">81</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="82" href="#82">82</a>              <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="83" href="#83">83</a>          <strong class="jxr_keyword">return</strong> encode(src, Base64Dialect.STANDARD, bufferFactory);
<a class="jxr_linenumber" name="84" href="#84">84</a>      }
<a class="jxr_linenumber" name="85" href="#85">85</a>  
<a class="jxr_linenumber" name="86" href="#86">86</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="87" href="#87">87</a>              <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, Base64Dialect dialect, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="88" href="#88">88</a>          <strong class="jxr_keyword">return</strong> encode(src, breakLines(dialect), dialect, bufferFactory);
<a class="jxr_linenumber" name="89" href="#89">89</a>      }
<a class="jxr_linenumber" name="90" href="#90">90</a>  
<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">boolean</strong> breakLines) {
<a class="jxr_linenumber" name="92" href="#92">92</a>          <strong class="jxr_keyword">return</strong> encode(src, breakLines, Base64Dialect.STANDARD);
<a class="jxr_linenumber" name="93" href="#93">93</a>      }
<a class="jxr_linenumber" name="94" href="#94">94</a>  
<a class="jxr_linenumber" name="95" href="#95">95</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="96" href="#96">96</a>              <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">boolean</strong> breakLines, Base64Dialect dialect) {
<a class="jxr_linenumber" name="97" href="#97">97</a>          <strong class="jxr_keyword">return</strong> encode(src, breakLines, dialect, HeapChannelBufferFactory.getInstance());
<a class="jxr_linenumber" name="98" href="#98">98</a>      }
<a class="jxr_linenumber" name="99" href="#99">99</a>  
<a class="jxr_linenumber" name="100" href="#100">100</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="101" href="#101">101</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">boolean</strong> breakLines, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="102" href="#102">102</a>         <strong class="jxr_keyword">return</strong> encode(src, breakLines, Base64Dialect.STANDARD, bufferFactory);
<a class="jxr_linenumber" name="103" href="#103">103</a>     }
<a class="jxr_linenumber" name="104" href="#104">104</a> 
<a class="jxr_linenumber" name="105" href="#105">105</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="106" href="#106">106</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">boolean</strong> breakLines, Base64Dialect dialect, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="107" href="#107">107</a> 
<a class="jxr_linenumber" name="108" href="#108">108</a>         <strong class="jxr_keyword">if</strong> (src == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="109" href="#109">109</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"src"</span>);
<a class="jxr_linenumber" name="110" href="#110">110</a>         }
<a class="jxr_linenumber" name="111" href="#111">111</a> 
<a class="jxr_linenumber" name="112" href="#112">112</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> dest = encode(
<a class="jxr_linenumber" name="113" href="#113">113</a>                 src, src.readerIndex(), src.readableBytes(), breakLines, dialect, bufferFactory);
<a class="jxr_linenumber" name="114" href="#114">114</a>         src.readerIndex(src.writerIndex());
<a class="jxr_linenumber" name="115" href="#115">115</a>         <strong class="jxr_keyword">return</strong> dest;
<a class="jxr_linenumber" name="116" href="#116">116</a>     }
<a class="jxr_linenumber" name="117" href="#117">117</a> 
<a class="jxr_linenumber" name="118" href="#118">118</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len) {
<a class="jxr_linenumber" name="119" href="#119">119</a>         <strong class="jxr_keyword">return</strong> encode(src, off, len, Base64Dialect.STANDARD);
<a class="jxr_linenumber" name="120" href="#120">120</a>     }
<a class="jxr_linenumber" name="121" href="#121">121</a> 
<a class="jxr_linenumber" name="122" href="#122">122</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len, Base64Dialect dialect) {
<a class="jxr_linenumber" name="123" href="#123">123</a>         <strong class="jxr_keyword">return</strong> encode(src, off, len, breakLines(dialect), dialect);
<a class="jxr_linenumber" name="124" href="#124">124</a>     }
<a class="jxr_linenumber" name="125" href="#125">125</a> 
<a class="jxr_linenumber" name="126" href="#126">126</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="127" href="#127">127</a>         <strong class="jxr_keyword">return</strong> encode(src, off, len, Base64Dialect.STANDARD, bufferFactory);
<a class="jxr_linenumber" name="128" href="#128">128</a>     }
<a class="jxr_linenumber" name="129" href="#129">129</a> 
<a class="jxr_linenumber" name="130" href="#130">130</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="131" href="#131">131</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len, Base64Dialect dialect, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="132" href="#132">132</a>         <strong class="jxr_keyword">return</strong> encode(src, off, len, breakLines(dialect), dialect, bufferFactory);
<a class="jxr_linenumber" name="133" href="#133">133</a>     }
<a class="jxr_linenumber" name="134" href="#134">134</a> 
<a class="jxr_linenumber" name="135" href="#135">135</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="136" href="#136">136</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len, <strong class="jxr_keyword">boolean</strong> breakLines) {
<a class="jxr_linenumber" name="137" href="#137">137</a>         <strong class="jxr_keyword">return</strong> encode(src, off, len, breakLines, Base64Dialect.STANDARD);
<a class="jxr_linenumber" name="138" href="#138">138</a>     }
<a class="jxr_linenumber" name="139" href="#139">139</a> 
<a class="jxr_linenumber" name="140" href="#140">140</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="141" href="#141">141</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len,
<a class="jxr_linenumber" name="142" href="#142">142</a>             <strong class="jxr_keyword">boolean</strong> breakLines, Base64Dialect dialect) {
<a class="jxr_linenumber" name="143" href="#143">143</a>         <strong class="jxr_keyword">return</strong> encode(src, off, len, breakLines, dialect, HeapChannelBufferFactory.getInstance());
<a class="jxr_linenumber" name="144" href="#144">144</a>     }
<a class="jxr_linenumber" name="145" href="#145">145</a> 
<a class="jxr_linenumber" name="146" href="#146">146</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="147" href="#147">147</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len,
<a class="jxr_linenumber" name="148" href="#148">148</a>             <strong class="jxr_keyword">boolean</strong> breakLines, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="149" href="#149">149</a>         <strong class="jxr_keyword">return</strong> encode(src, off, len, breakLines, Base64Dialect.STANDARD, bufferFactory);
<a class="jxr_linenumber" name="150" href="#150">150</a>     }
<a class="jxr_linenumber" name="151" href="#151">151</a> 
<a class="jxr_linenumber" name="152" href="#152">152</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> encode(
<a class="jxr_linenumber" name="153" href="#153">153</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len,
<a class="jxr_linenumber" name="154" href="#154">154</a>             <strong class="jxr_keyword">boolean</strong> breakLines, Base64Dialect dialect, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="155" href="#155">155</a> 
<a class="jxr_linenumber" name="156" href="#156">156</a>         <strong class="jxr_keyword">if</strong> (src == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="157" href="#157">157</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"src"</span>);
<a class="jxr_linenumber" name="158" href="#158">158</a>         }
<a class="jxr_linenumber" name="159" href="#159">159</a>         <strong class="jxr_keyword">if</strong> (dialect == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="160" href="#160">160</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"dialect"</span>);
<a class="jxr_linenumber" name="161" href="#161">161</a>         }
<a class="jxr_linenumber" name="162" href="#162">162</a>         <strong class="jxr_keyword">if</strong> (bufferFactory == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="163" href="#163">163</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"bufferFactory"</span>);
<a class="jxr_linenumber" name="164" href="#164">164</a>         }
<a class="jxr_linenumber" name="165" href="#165">165</a> 
<a class="jxr_linenumber" name="166" href="#166">166</a>         <strong class="jxr_keyword">int</strong> len43 = len * 4 / 3;
<a class="jxr_linenumber" name="167" href="#167">167</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> dest = bufferFactory.getBuffer(
<a class="jxr_linenumber" name="168" href="#168">168</a>                 src.order(),
<a class="jxr_linenumber" name="169" href="#169">169</a>                 len43 +
<a class="jxr_linenumber" name="170" href="#170">170</a>                 (len % 3 &gt; 0? 4 : 0) + <em class="jxr_comment">// Account for padding</em>
<a class="jxr_linenumber" name="171" href="#171">171</a>                 (breakLines? len43 / MAX_LINE_LENGTH : 0)); <em class="jxr_comment">// New lines</em>
<a class="jxr_linenumber" name="172" href="#172">172</a>         <strong class="jxr_keyword">int</strong> d = 0;
<a class="jxr_linenumber" name="173" href="#173">173</a>         <strong class="jxr_keyword">int</strong> e = 0;
<a class="jxr_linenumber" name="174" href="#174">174</a>         <strong class="jxr_keyword">int</strong> len2 = len - 2;
<a class="jxr_linenumber" name="175" href="#175">175</a>         <strong class="jxr_keyword">int</strong> lineLength = 0;
<a class="jxr_linenumber" name="176" href="#176">176</a>         <strong class="jxr_keyword">for</strong> (; d &lt; len2; d += 3, e += 4) {
<a class="jxr_linenumber" name="177" href="#177">177</a>             encode3to4(src, d + off, 3, dest, e, dialect);
<a class="jxr_linenumber" name="178" href="#178">178</a> 
<a class="jxr_linenumber" name="179" href="#179">179</a>             lineLength += 4;
<a class="jxr_linenumber" name="180" href="#180">180</a>             <strong class="jxr_keyword">if</strong> (breakLines &amp;&amp; lineLength == MAX_LINE_LENGTH) {
<a class="jxr_linenumber" name="181" href="#181">181</a>                 dest.setByte(e + 4, NEW_LINE);
<a class="jxr_linenumber" name="182" href="#182">182</a>                 e ++;
<a class="jxr_linenumber" name="183" href="#183">183</a>                 lineLength = 0;
<a class="jxr_linenumber" name="184" href="#184">184</a>             } <em class="jxr_comment">// end if: end of line</em>
<a class="jxr_linenumber" name="185" href="#185">185</a>         } <em class="jxr_comment">// end for: each piece of array</em>
<a class="jxr_linenumber" name="186" href="#186">186</a> 
<a class="jxr_linenumber" name="187" href="#187">187</a>         <strong class="jxr_keyword">if</strong> (d &lt; len) {
<a class="jxr_linenumber" name="188" href="#188">188</a>             encode3to4(src, d + off, len - d, dest, e, dialect);
<a class="jxr_linenumber" name="189" href="#189">189</a>             e += 4;
<a class="jxr_linenumber" name="190" href="#190">190</a>         } <em class="jxr_comment">// end if: some padding needed</em>
<a class="jxr_linenumber" name="191" href="#191">191</a> 
<a class="jxr_linenumber" name="192" href="#192">192</a>         <strong class="jxr_keyword">return</strong> dest.slice(0, e);
<a class="jxr_linenumber" name="193" href="#193">193</a>     }
<a class="jxr_linenumber" name="194" href="#194">194</a> 
<a class="jxr_linenumber" name="195" href="#195">195</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> encode3to4(
<a class="jxr_linenumber" name="196" href="#196">196</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> srcOffset, <strong class="jxr_keyword">int</strong> numSigBytes,
<a class="jxr_linenumber" name="197" href="#197">197</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> dest, <strong class="jxr_keyword">int</strong> destOffset, Base64Dialect dialect) {
<a class="jxr_linenumber" name="198" href="#198">198</a> 
<a class="jxr_linenumber" name="199" href="#199">199</a>         byte[] ALPHABET = alphabet(dialect);
<a class="jxr_linenumber" name="200" href="#200">200</a> 
<a class="jxr_linenumber" name="201" href="#201">201</a>         <em class="jxr_comment">//           1         2         3</em>
<a class="jxr_linenumber" name="202" href="#202">202</a>         <em class="jxr_comment">// 01234567890123456789012345678901 Bit position</em>
<a class="jxr_linenumber" name="203" href="#203">203</a>         <em class="jxr_comment">// --------000000001111111122222222 Array position from threeBytes</em>
<a class="jxr_linenumber" name="204" href="#204">204</a>         <em class="jxr_comment">// --------|    ||    ||    ||    | Six bit groups to index ALPHABET</em>
<a class="jxr_linenumber" name="205" href="#205">205</a>         <em class="jxr_comment">//          &gt;&gt;18  &gt;&gt;12  &gt;&gt; 6  &gt;&gt; 0  Right shift necessary</em>
<a class="jxr_linenumber" name="206" href="#206">206</a>         <em class="jxr_comment">//                0x3f  0x3f  0x3f  Additional AND</em>
<a class="jxr_linenumber" name="207" href="#207">207</a> 
<a class="jxr_linenumber" name="208" href="#208">208</a>         <em class="jxr_comment">// Create buffer with zero-padding if there are only one or two</em>
<a class="jxr_linenumber" name="209" href="#209">209</a>         <em class="jxr_comment">// significant bytes passed in the array.</em>
<a class="jxr_linenumber" name="210" href="#210">210</a>         <em class="jxr_comment">// We have to shift left 24 in order to flush out the 1's that appear</em>
<a class="jxr_linenumber" name="211" href="#211">211</a>         <em class="jxr_comment">// when Java treats a value as negative that is cast from a byte to an int.</em>
<a class="jxr_linenumber" name="212" href="#212">212</a>         <strong class="jxr_keyword">int</strong> inBuff =
<a class="jxr_linenumber" name="213" href="#213">213</a>                 (numSigBytes &gt; 0? src.getByte(srcOffset)     &lt;&lt; 24 &gt;&gt;&gt;  8 : 0) |
<a class="jxr_linenumber" name="214" href="#214">214</a>                 (numSigBytes &gt; 1? src.getByte(srcOffset + 1) &lt;&lt; 24 &gt;&gt;&gt; 16 : 0) |
<a class="jxr_linenumber" name="215" href="#215">215</a>                 (numSigBytes &gt; 2? src.getByte(srcOffset + 2) &lt;&lt; 24 &gt;&gt;&gt; 24 : 0);
<a class="jxr_linenumber" name="216" href="#216">216</a> 
<a class="jxr_linenumber" name="217" href="#217">217</a>         <strong class="jxr_keyword">switch</strong> (numSigBytes) {
<a class="jxr_linenumber" name="218" href="#218">218</a>         <strong class="jxr_keyword">case</strong> 3:
<a class="jxr_linenumber" name="219" href="#219">219</a>             dest.setByte(destOffset    , ALPHABET[inBuff &gt;&gt;&gt; 18       ]);
<a class="jxr_linenumber" name="220" href="#220">220</a>             dest.setByte(destOffset + 1, ALPHABET[inBuff &gt;&gt;&gt; 12 &amp; 0x3f]);
<a class="jxr_linenumber" name="221" href="#221">221</a>             dest.setByte(destOffset + 2, ALPHABET[inBuff &gt;&gt;&gt;  6 &amp; 0x3f]);
<a class="jxr_linenumber" name="222" href="#222">222</a>             dest.setByte(destOffset + 3, ALPHABET[inBuff        &amp; 0x3f]);
<a class="jxr_linenumber" name="223" href="#223">223</a>             <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="224" href="#224">224</a>         <strong class="jxr_keyword">case</strong> 2:
<a class="jxr_linenumber" name="225" href="#225">225</a>             dest.setByte(destOffset    , ALPHABET[inBuff &gt;&gt;&gt; 18       ]);
<a class="jxr_linenumber" name="226" href="#226">226</a>             dest.setByte(destOffset + 1, ALPHABET[inBuff &gt;&gt;&gt; 12 &amp; 0x3f]);
<a class="jxr_linenumber" name="227" href="#227">227</a>             dest.setByte(destOffset + 2, ALPHABET[inBuff &gt;&gt;&gt; 6  &amp; 0x3f]);
<a class="jxr_linenumber" name="228" href="#228">228</a>             dest.setByte(destOffset + 3, EQUALS_SIGN);
<a class="jxr_linenumber" name="229" href="#229">229</a>             <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="230" href="#230">230</a>         <strong class="jxr_keyword">case</strong> 1:
<a class="jxr_linenumber" name="231" href="#231">231</a>             dest.setByte(destOffset    , ALPHABET[inBuff &gt;&gt;&gt; 18       ]);
<a class="jxr_linenumber" name="232" href="#232">232</a>             dest.setByte(destOffset + 1, ALPHABET[inBuff &gt;&gt;&gt; 12 &amp; 0x3f]);
<a class="jxr_linenumber" name="233" href="#233">233</a>             dest.setByte(destOffset + 2, EQUALS_SIGN);
<a class="jxr_linenumber" name="234" href="#234">234</a>             dest.setByte(destOffset + 3, EQUALS_SIGN);
<a class="jxr_linenumber" name="235" href="#235">235</a>             <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="236" href="#236">236</a>         }
<a class="jxr_linenumber" name="237" href="#237">237</a>     }
<a class="jxr_linenumber" name="238" href="#238">238</a> 
<a class="jxr_linenumber" name="239" href="#239">239</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> decode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src) {
<a class="jxr_linenumber" name="240" href="#240">240</a>         <strong class="jxr_keyword">return</strong> decode(src, Base64Dialect.STANDARD);
<a class="jxr_linenumber" name="241" href="#241">241</a>     }
<a class="jxr_linenumber" name="242" href="#242">242</a> 
<a class="jxr_linenumber" name="243" href="#243">243</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> decode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, Base64Dialect dialect) {
<a class="jxr_linenumber" name="244" href="#244">244</a>         <strong class="jxr_keyword">return</strong> decode(src, dialect, HeapChannelBufferFactory.getInstance());
<a class="jxr_linenumber" name="245" href="#245">245</a>     }
<a class="jxr_linenumber" name="246" href="#246">246</a> 
<a class="jxr_linenumber" name="247" href="#247">247</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> decode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="248" href="#248">248</a>         <strong class="jxr_keyword">return</strong> decode(src, Base64Dialect.STANDARD, bufferFactory);
<a class="jxr_linenumber" name="249" href="#249">249</a>     }
<a class="jxr_linenumber" name="250" href="#250">250</a> 
<a class="jxr_linenumber" name="251" href="#251">251</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> decode(<a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, Base64Dialect dialect, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="252" href="#252">252</a> 
<a class="jxr_linenumber" name="253" href="#253">253</a>         <strong class="jxr_keyword">if</strong> (src == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="254" href="#254">254</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"src"</span>);
<a class="jxr_linenumber" name="255" href="#255">255</a>         }
<a class="jxr_linenumber" name="256" href="#256">256</a> 
<a class="jxr_linenumber" name="257" href="#257">257</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> dest = decode(src, src.readerIndex(), src.readableBytes(), dialect, bufferFactory);
<a class="jxr_linenumber" name="258" href="#258">258</a>         src.readerIndex(src.writerIndex());
<a class="jxr_linenumber" name="259" href="#259">259</a>         <strong class="jxr_keyword">return</strong> dest;
<a class="jxr_linenumber" name="260" href="#260">260</a>     }
<a class="jxr_linenumber" name="261" href="#261">261</a> 
<a class="jxr_linenumber" name="262" href="#262">262</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> decode(
<a class="jxr_linenumber" name="263" href="#263">263</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len) {
<a class="jxr_linenumber" name="264" href="#264">264</a>         <strong class="jxr_keyword">return</strong> decode(src, off, len, Base64Dialect.STANDARD);
<a class="jxr_linenumber" name="265" href="#265">265</a>     }
<a class="jxr_linenumber" name="266" href="#266">266</a> 
<a class="jxr_linenumber" name="267" href="#267">267</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> decode(
<a class="jxr_linenumber" name="268" href="#268">268</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len, Base64Dialect dialect) {
<a class="jxr_linenumber" name="269" href="#269">269</a>         <strong class="jxr_keyword">return</strong> decode(src, off, len, dialect, HeapChannelBufferFactory.getInstance());
<a class="jxr_linenumber" name="270" href="#270">270</a>     }
<a class="jxr_linenumber" name="271" href="#271">271</a> 
<a class="jxr_linenumber" name="272" href="#272">272</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> decode(
<a class="jxr_linenumber" name="273" href="#273">273</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len, <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="274" href="#274">274</a>         <strong class="jxr_keyword">return</strong> decode(src, off, len, Base64Dialect.STANDARD, bufferFactory);
<a class="jxr_linenumber" name="275" href="#275">275</a>     }
<a class="jxr_linenumber" name="276" href="#276">276</a> 
<a class="jxr_linenumber" name="277" href="#277">277</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> decode(
<a class="jxr_linenumber" name="278" href="#278">278</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> src, <strong class="jxr_keyword">int</strong> off, <strong class="jxr_keyword">int</strong> len, Base64Dialect dialect,
<a class="jxr_linenumber" name="279" href="#279">279</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBufferFactory.html">ChannelBufferFactory</a> bufferFactory) {
<a class="jxr_linenumber" name="280" href="#280">280</a> 
<a class="jxr_linenumber" name="281" href="#281">281</a>         <strong class="jxr_keyword">if</strong> (src == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="282" href="#282">282</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"src"</span>);
<a class="jxr_linenumber" name="283" href="#283">283</a>         }
<a class="jxr_linenumber" name="284" href="#284">284</a>         <strong class="jxr_keyword">if</strong> (dialect == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="285" href="#285">285</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"dialect"</span>);
<a class="jxr_linenumber" name="286" href="#286">286</a>         }
<a class="jxr_linenumber" name="287" href="#287">287</a>         <strong class="jxr_keyword">if</strong> (bufferFactory == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="288" href="#288">288</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"bufferFactory"</span>);
<a class="jxr_linenumber" name="289" href="#289">289</a>         }
<a class="jxr_linenumber" name="290" href="#290">290</a> 
<a class="jxr_linenumber" name="291" href="#291">291</a>         byte[] DECODABET = decodabet(dialect);
<a class="jxr_linenumber" name="292" href="#292">292</a> 
<a class="jxr_linenumber" name="293" href="#293">293</a>         <strong class="jxr_keyword">int</strong> len34 = len * 3 / 4;
<a class="jxr_linenumber" name="294" href="#294">294</a>         <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> dest = bufferFactory.getBuffer(src.order(), len34); <em class="jxr_comment">// Upper limit on size of output</em>
<a class="jxr_linenumber" name="295" href="#295">295</a>         <strong class="jxr_keyword">int</strong> outBuffPosn = 0;
<a class="jxr_linenumber" name="296" href="#296">296</a> 
<a class="jxr_linenumber" name="297" href="#297">297</a>         byte[] b4 = <strong class="jxr_keyword">new</strong> byte[4];
<a class="jxr_linenumber" name="298" href="#298">298</a>         <strong class="jxr_keyword">int</strong> b4Posn = 0;
<a class="jxr_linenumber" name="299" href="#299">299</a>         <strong class="jxr_keyword">int</strong> i;
<a class="jxr_linenumber" name="300" href="#300">300</a>         byte sbiCrop;
<a class="jxr_linenumber" name="301" href="#301">301</a>         byte sbiDecode;
<a class="jxr_linenumber" name="302" href="#302">302</a>         <strong class="jxr_keyword">for</strong> (i = off; i &lt; off + len; i ++) {
<a class="jxr_linenumber" name="303" href="#303">303</a>             sbiCrop = (byte) (src.getByte(i) &amp; 0x7f); <em class="jxr_comment">// Only the low seven bits</em>
<a class="jxr_linenumber" name="304" href="#304">304</a>             sbiDecode = DECODABET[sbiCrop];
<a class="jxr_linenumber" name="305" href="#305">305</a> 
<a class="jxr_linenumber" name="306" href="#306">306</a>             <strong class="jxr_keyword">if</strong> (sbiDecode &gt;= WHITE_SPACE_ENC) { <em class="jxr_comment">// White space, Equals sign or better</em>
<a class="jxr_linenumber" name="307" href="#307">307</a>                 <strong class="jxr_keyword">if</strong> (sbiDecode &gt;= EQUALS_SIGN_ENC) { <em class="jxr_comment">// Equals sign or better?</em>
<a class="jxr_linenumber" name="308" href="#308">308</a>                     b4[b4Posn ++] = sbiCrop;
<a class="jxr_linenumber" name="309" href="#309">309</a>                     <strong class="jxr_keyword">if</strong> (b4Posn &gt; 3) { <em class="jxr_comment">// Quartet built?</em>
<a class="jxr_linenumber" name="310" href="#310">310</a>                         outBuffPosn += decode4to3(
<a class="jxr_linenumber" name="311" href="#311">311</a>                                 b4, 0, dest, outBuffPosn, dialect);
<a class="jxr_linenumber" name="312" href="#312">312</a>                         b4Posn = 0;
<a class="jxr_linenumber" name="313" href="#313">313</a> 
<a class="jxr_linenumber" name="314" href="#314">314</a>                         <em class="jxr_comment">// If that was the equals sign, break out of 'for' loop</em>
<a class="jxr_linenumber" name="315" href="#315">315</a>                         <strong class="jxr_keyword">if</strong> (sbiCrop == EQUALS_SIGN) {
<a class="jxr_linenumber" name="316" href="#316">316</a>                             <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="317" href="#317">317</a>                         }
<a class="jxr_linenumber" name="318" href="#318">318</a>                     }
<a class="jxr_linenumber" name="319" href="#319">319</a>                 }
<a class="jxr_linenumber" name="320" href="#320">320</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="321" href="#321">321</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a class="jxr_linenumber" name="322" href="#322">322</a>                         <span class="jxr_string">"bad Base64 input character at "</span> + i + <span class="jxr_string">": "</span> +
<a class="jxr_linenumber" name="323" href="#323">323</a>                         src.getUnsignedByte(i) + <span class="jxr_string">" (decimal)"</span>);
<a class="jxr_linenumber" name="324" href="#324">324</a>             }
<a class="jxr_linenumber" name="325" href="#325">325</a>         }
<a class="jxr_linenumber" name="326" href="#326">326</a> 
<a class="jxr_linenumber" name="327" href="#327">327</a>         <strong class="jxr_keyword">return</strong> dest.slice(0, outBuffPosn);
<a class="jxr_linenumber" name="328" href="#328">328</a>     }
<a class="jxr_linenumber" name="329" href="#329">329</a> 
<a class="jxr_linenumber" name="330" href="#330">330</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> decode4to3(
<a class="jxr_linenumber" name="331" href="#331">331</a>             byte[] src, <strong class="jxr_keyword">int</strong> srcOffset,
<a class="jxr_linenumber" name="332" href="#332">332</a>             <a href="../../../../../../org/jboss/netty/buffer/ChannelBuffer.html">ChannelBuffer</a> dest, <strong class="jxr_keyword">int</strong> destOffset, Base64Dialect dialect) {
<a class="jxr_linenumber" name="333" href="#333">333</a> 
<a class="jxr_linenumber" name="334" href="#334">334</a>         byte[] DECODABET = decodabet(dialect);
<a class="jxr_linenumber" name="335" href="#335">335</a> 
<a class="jxr_linenumber" name="336" href="#336">336</a>         <strong class="jxr_keyword">if</strong> (src[srcOffset + 2] == EQUALS_SIGN) {
<a class="jxr_linenumber" name="337" href="#337">337</a>             <em class="jxr_comment">// Example: Dk==</em>
<a class="jxr_linenumber" name="338" href="#338">338</a>             <strong class="jxr_keyword">int</strong> outBuff =
<a class="jxr_linenumber" name="339" href="#339">339</a>                     (DECODABET[src[srcOffset    ]] &amp; 0xFF) &lt;&lt; 18 |
<a class="jxr_linenumber" name="340" href="#340">340</a>                     (DECODABET[src[srcOffset + 1]] &amp; 0xFF) &lt;&lt; 12;
<a class="jxr_linenumber" name="341" href="#341">341</a> 
<a class="jxr_linenumber" name="342" href="#342">342</a>             dest.setByte(destOffset, (byte) (outBuff &gt;&gt;&gt; 16));
<a class="jxr_linenumber" name="343" href="#343">343</a>             <strong class="jxr_keyword">return</strong> 1;
<a class="jxr_linenumber" name="344" href="#344">344</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (src[srcOffset + 3] == EQUALS_SIGN) {
<a class="jxr_linenumber" name="345" href="#345">345</a>             <em class="jxr_comment">// Example: DkL=</em>
<a class="jxr_linenumber" name="346" href="#346">346</a>             <strong class="jxr_keyword">int</strong> outBuff =
<a class="jxr_linenumber" name="347" href="#347">347</a>                     (DECODABET[src[srcOffset    ]] &amp; 0xFF) &lt;&lt; 18 |
<a class="jxr_linenumber" name="348" href="#348">348</a>                     (DECODABET[src[srcOffset + 1]] &amp; 0xFF) &lt;&lt; 12 |
<a class="jxr_linenumber" name="349" href="#349">349</a>                     (DECODABET[src[srcOffset + 2]] &amp; 0xFF) &lt;&lt;  6;
<a class="jxr_linenumber" name="350" href="#350">350</a> 
<a class="jxr_linenumber" name="351" href="#351">351</a>             dest.setByte(destOffset    , (byte) (outBuff &gt;&gt;&gt; 16));
<a class="jxr_linenumber" name="352" href="#352">352</a>             dest.setByte(destOffset + 1, (byte) (outBuff &gt;&gt;&gt;  8));
<a class="jxr_linenumber" name="353" href="#353">353</a>             <strong class="jxr_keyword">return</strong> 2;
<a class="jxr_linenumber" name="354" href="#354">354</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="355" href="#355">355</a>             <em class="jxr_comment">// Example: DkLE</em>
<a class="jxr_linenumber" name="356" href="#356">356</a>             <strong class="jxr_keyword">int</strong> outBuff;
<a class="jxr_linenumber" name="357" href="#357">357</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="358" href="#358">358</a>                 outBuff =
<a class="jxr_linenumber" name="359" href="#359">359</a>                         (DECODABET[src[srcOffset    ]] &amp; 0xFF) &lt;&lt; 18 |
<a class="jxr_linenumber" name="360" href="#360">360</a>                         (DECODABET[src[srcOffset + 1]] &amp; 0xFF) &lt;&lt; 12 |
<a class="jxr_linenumber" name="361" href="#361">361</a>                         (DECODABET[src[srcOffset + 2]] &amp; 0xFF) &lt;&lt;  6 |
<a class="jxr_linenumber" name="362" href="#362">362</a>                          DECODABET[src[srcOffset + 3]] &amp; 0xFF;
<a class="jxr_linenumber" name="363" href="#363">363</a>             } <strong class="jxr_keyword">catch</strong> (IndexOutOfBoundsException e) {
<a class="jxr_linenumber" name="364" href="#364">364</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"not encoded in Base64"</span>);
<a class="jxr_linenumber" name="365" href="#365">365</a>             }
<a class="jxr_linenumber" name="366" href="#366">366</a> 
<a class="jxr_linenumber" name="367" href="#367">367</a>             dest.setByte(destOffset    , (byte) (outBuff &gt;&gt; 16));
<a class="jxr_linenumber" name="368" href="#368">368</a>             dest.setByte(destOffset + 1, (byte) (outBuff &gt;&gt;  8));
<a class="jxr_linenumber" name="369" href="#369">369</a>             dest.setByte(destOffset + 2, (byte)  outBuff);
<a class="jxr_linenumber" name="370" href="#370">370</a>             <strong class="jxr_keyword">return</strong> 3;
<a class="jxr_linenumber" name="371" href="#371">371</a>         }
<a class="jxr_linenumber" name="372" href="#372">372</a>     }
<a class="jxr_linenumber" name="373" href="#373">373</a> 
<a class="jxr_linenumber" name="374" href="#374">374</a>     <strong class="jxr_keyword">private</strong> Base64() {
<a class="jxr_linenumber" name="375" href="#375">375</a>         <em class="jxr_comment">// Unused</em>
<a class="jxr_linenumber" name="376" href="#376">376</a>     }
<a class="jxr_linenumber" name="377" href="#377">377</a> }
</pre>
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